Expo '85, officially called The International Exposition, Tsukuba, Japan, 1985(国際科学技術博覧会,Kokusai Kagaku Gijutsu Hakurankai?, "The International Science Technology Exposition"), was a world's fair held in Tsukuba, Ibaraki, Japan (Tsukuba Science City, a planned city focused on technology north of Tokyo) between Sunday, March 17 and Monday, September 16, 1985. The theme of the fair was "Dwellings and Surroundings - Science and Technology for Man at Home". Attendance was over 20 million and 111 countries participated.